From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([209.51.188.92]:34890) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gjB6o-0004Ez-4C for qemu-devel@nongnu.org; Mon, 14 Jan 2019 17:53:30 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gjB6n-0001O3-A9 for qemu-devel@nongnu.org; Mon, 14 Jan 2019 17:53:30 -0500 Received: from hera.aquilenet.fr ([2a0c:e300::1]:37336) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1gjB6m-0001MY-Ue for qemu-devel@nongnu.org; Mon, 14 Jan 2019 17:53:29 -0500 From: Samuel Thibault Date: Mon, 14 Jan 2019 23:52:19 +0100 Message-Id: <20190114225306.21569-19-samuel.thibault@ens-lyon.org> In-Reply-To: <20190114225306.21569-1-samuel.thibault@ens-lyon.org> References: <20190114225306.21569-1-samuel.thibault@ens-lyon.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Subject: [Qemu-devel] [PULL 18/65] slirp: remove the disabled readv()/writev() code path List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , stefanha@redhat.com, jan.kiszka@siemens.com, =?UTF-8?q?Daniel=20P=20=2E=20Berrang=C3=A9?= , Samuel Thibault From: Marc-Andr=C3=A9 Lureau The soread() function may be used on datagram sockets, and would provide different behaviour if HAVE_READV was set, on empty datagrams. This looks like a minor optimization, that never has been a strong goal for slirp. Signed-off-by: Marc-Andr=C3=A9 Lureau Reviewed-by: Daniel P. Berrang=C3=A9 Signed-off-by: Samuel Thibault --- slirp/slirp_config.h | 3 --- slirp/socket.c | 15 --------------- 2 files changed, 18 deletions(-) diff --git a/slirp/slirp_config.h b/slirp/slirp_config.h index f0cc1c781b..3ce64e088e 100644 --- a/slirp/slirp_config.h +++ b/slirp/slirp_config.h @@ -29,9 +29,6 @@ /* Define if the machine is big endian */ //#undef HOST_WORDS_BIGENDIAN =20 -/* Define if you have readv */ -#undef HAVE_READV - /* Define if iovec needs to be declared */ #undef DECLARE_IOVEC #ifdef _WIN32 diff --git a/slirp/socket.c b/slirp/socket.c index 041ec5061a..7012c7c07d 100644 --- a/slirp/socket.c +++ b/slirp/socket.c @@ -187,12 +187,7 @@ soread(struct socket *so) */ sopreprbuf(so, iov, &n); =20 -#ifdef HAVE_READV - nn =3D readv(so->s, (struct iovec *)iov, n); - DEBUG_MISC((dfd, " ... read nn =3D %d bytes\n", nn)); -#else nn =3D qemu_recv(so->s, iov[0].iov_base, iov[0].iov_len,0); -#endif if (nn <=3D 0) { if (nn < 0 && (errno =3D=3D EINTR || errno =3D=3D EAGAIN)) return 0; @@ -226,7 +221,6 @@ soread(struct socket *so) } } =20 -#ifndef HAVE_READV /* * If there was no error, try and read the second time round * We read again if n =3D 2 (ie, there's another part of the buffer) @@ -244,7 +238,6 @@ soread(struct socket *so) } =20 DEBUG_MISC((dfd, " ... read nn =3D %d bytes\n", nn)); -#endif =20 /* Update fields */ sb->sb_cc +=3D nn; @@ -452,13 +445,7 @@ sowrite(struct socket *so) } /* Check if there's urgent data to send, and if so, send it */ =20 -#ifdef HAVE_READV - nn =3D writev(so->s, (const struct iovec *)iov, n); - - DEBUG_MISC((dfd, " ... wrote nn =3D %d bytes\n", nn)); -#else nn =3D slirp_send(so, iov[0].iov_base, iov[0].iov_len,0); -#endif /* This should never happen, but people tell me it does *shrug* */ if (nn < 0 && (errno =3D=3D EAGAIN || errno =3D=3D EINTR)) return 0; @@ -467,7 +454,6 @@ sowrite(struct socket *so) goto err_disconnected; } =20 -#ifndef HAVE_READV if (n =3D=3D 2 && nn =3D=3D iov[0].iov_len) { int ret; ret =3D slirp_send(so, iov[1].iov_base, iov[1].iov_len,0); @@ -475,7 +461,6 @@ sowrite(struct socket *so) nn +=3D ret; } DEBUG_MISC((dfd, " ... wrote nn =3D %d bytes\n", nn)); -#endif =20 /* Update sbuf */ sb->sb_cc -=3D nn; --=20 2.20.1